Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a18aa8e53478d0…

MALICIOUS

PDF

44.0 KB Created: 2021-05-13 06:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e143d5530fe0a56340f41fbc1636a2f9 SHA-1: d029902ac0b8ebb7aa2a680e22d69be32dd85497 SHA-256: f0a18aa8e53478d024e543697d5cc436f780e25cef5662f84a3476e5df1d6286
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting game hacks and cheats. The document body and embedded URLs strongly suggest a lure designed to trick users into visiting these malicious sites, likely for further exploitation or malware delivery. No scripts were extracted, but the heuristic firings indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/how-to-hack-coin-master-cheat-engine-game-hack In PDF document text
    • http://www.hlad.hr/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45BA 25148 bytes
SHA-256: 75882bdb535cd3edee51ad155e5e8f76866b9b1e24e894c2b86f1f53d41ae919
font_01_sfnt_off00007ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE1 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off000088fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FB 18332 bytes
SHA-256: 3a4ccd6cf68d04e1f61f192e0e505e5625435643e4a63e10a197213400e78cbb

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